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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Kinship Testing Based on SNPs Using Microarray System.

Sohee Cho1, Hee Jin Seo1, Jihyun Lee1

  • 1Department of Forensic Medicine, Seoul National University, College of Medicine, Seoul, South Korea.

Transfusion Medicine and Hemotherapy : Offizielles Organ Der Deutschen Gesellschaft Fur Transfusionsmedizin Und Immunhamatologie
|December 21, 2016
PubMed
Summary
This summary is machine-generated.

Single nucleotide polymorphism (SNP) typing using microarrays offers a valuable supplement to short tandem repeat (STR) analysis for forensic kinship testing, especially with degraded DNA samples.

Keywords:
Kinship testingMicroarrayReference databaseSNP

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Area of Science:

  • Forensic genetics
  • Molecular biology
  • Population genetics

Background:

  • Traditional short tandem repeat (STR) typing can be insufficient for kinship analysis with degraded DNA or in populations with inbreeding.
  • Biallelic single nucleotide polymorphism (SNP) markers, particularly on microarrays, provide a complementary approach to STRs in forensic investigations.

Observation:

  • A case involving two bone samples with partial STR profiles required advanced kinship testing.
  • The samples originated from a geographically isolated population, necessitating careful interpretation of kinship indices (PI).

Findings:

  • SNP typing on an Affymetrix microarray successfully identified kinship candidates for the bone samples.
  • SNP analysis yielded improved PI values compared to STR typing alone and revealed no discrepant SNPs.

Implications:

  • The study demonstrates the effectiveness of multi-SNP microarray analysis in practical forensic casework.
  • Establishing a comprehensive reference database is crucial for maximizing the utility of SNP typing in kinship determination.